*/
#include <linux/kernel.h>
+#include <linux/cdrom.h>
#include <linux/delay.h>
#include <linux/ide.h>
#include <scsi/scsi.h>
#define debug_log(fmt, args...) do {} while (0)
#endif
+#define ATAPI_MIN_CDB_BYTES 12
+
+static inline int dev_is_idecd(ide_drive_t *drive)
+{
+ return drive->media == ide_cdrom || drive->media == ide_optical;
+}
+
/*
* Check whether we can support a device,
* based on the ATAPI IDENTIFY command results.
}
EXPORT_SYMBOL_GPL(ide_retry_pc);
-int ide_scsi_expiry(ide_drive_t *drive)
+int ide_cd_expiry(ide_drive_t *drive)
{
- struct ide_atapi_pc *pc = drive->pc;
+ struct request *rq = HWGROUP(drive)->rq;
+ unsigned long wait = 0;
- debug_log("%s called for %lu at %lu\n", __func__,
- pc->scsi_cmd->serial_number, jiffies);
+ debug_log("%s: rq->cmd[0]: 0x%x\n", __func__, rq->cmd[0]);
- pc->flags |= PC_FLAG_TIMEDOUT;
+ /*
+ * Some commands are *slow* and normally take a long time to complete.
+ * Usually we can use the ATAPI "disconnect" to bypass this, but not all
+ * commands/drives support that. Let ide_timer_expiry keep polling us
+ * for these.
+ */
+ switch (rq->cmd[0]) {
+ case GPCMD_BLANK:
+ case GPCMD_FORMAT_UNIT:
+ case GPCMD_RESERVE_RZONE_TRACK:
+ case GPCMD_CLOSE_TRACK:
+ case GPCMD_FLUSH_CACHE:
+ wait = ATAPI_WAIT_PC;
+ break;
+ default:
+ if (!(rq->cmd_flags & REQ_QUIET))
+ printk(KERN_INFO "cmd 0x%x timed out\n",
+ rq->cmd[0]);
+ wait = 0;
+ break;
+ }
+ return wait;
+}
+EXPORT_SYMBOL_GPL(ide_cd_expiry);
- return 0; /* we do not want the IDE subsystem to retry */
+int ide_cd_get_xferlen(struct request *rq)
+{
+ if (blk_fs_request(rq))
+ return 32768;
+ else if (blk_sense_request(rq) || blk_pc_request(rq) ||
+ rq->cmd_type == REQ_TYPE_ATA_PC)
+ return rq->data_len;
+ else
+ return 0;
}
-EXPORT_SYMBOL_GPL(ide_scsi_expiry);
+EXPORT_SYMBOL_GPL(ide_cd_get_xferlen);
/*
* This is the usual interrupt handler which will be called during a packet
struct request *rq = hwif->hwgroup->rq;
const struct ide_tp_ops *tp_ops = hwif->tp_ops;
xfer_func_t *xferfunc;
- ide_expiry_t *expiry;
unsigned int timeout, temp;
u16 bcount;
- u8 stat, ireason, scsi = !!(drive->dev_flags & IDE_DFLAG_SCSI), dsc = 0;
+ u8 stat, ireason, dsc = 0;
debug_log("Enter %s - interrupt handler\n", __func__);
- if (scsi) {
- timeout = ide_scsi_get_timeout(pc);
- expiry = ide_scsi_expiry;
- } else {
- timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
- : WAIT_TAPE_CMD;
- expiry = NULL;
- }
+ timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
+ : WAIT_TAPE_CMD;
if (pc->flags & PC_FLAG_TIMEDOUT) {
drive->pc_callback(drive, 0);
if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) {
if (hwif->dma_ops->dma_end(drive) ||
- (drive->media == ide_tape && !scsi && (stat & ATA_ERR))) {
- if (drive->media == ide_floppy && !scsi)
+ (drive->media == ide_tape && (stat & ATA_ERR))) {
+ if (drive->media == ide_floppy)
printk(KERN_ERR "%s: DMA %s error\n",
drive->name, rq_data_dir(pc->rq)
? "write" : "read");
local_irq_enable_in_hardirq();
- if (drive->media == ide_tape && !scsi &&
+ if (drive->media == ide_tape &&
(stat & ATA_ERR) && rq->cmd[0] == REQUEST_SENSE)
stat &= ~ATA_ERR;
/* Error detected */
debug_log("%s: I/O error\n", drive->name);
- if (drive->media != ide_tape || scsi) {
+ if (drive->media != ide_tape)
pc->rq->errors++;
- if (scsi)
- goto cmd_finished;
- }
if (rq->cmd[0] == REQUEST_SENSE) {
printk(KERN_ERR "%s: I/O error in request sense"
/* queued, but not started */
return ide_stopped;
}
-cmd_finished:
pc->error = 0;
if ((pc->flags & PC_FLAG_WAIT_FOR_DSC) && (stat & ATA_DSC) == 0)
"us more data than expected - "
"discarding data\n",
drive->name);
- if (scsi)
- temp = pc->buf_size - pc->xferred;
- else
- temp = 0;
- if (temp) {
- if (pc->sg)
- drive->pc_io_buffers(drive, pc,
- temp, 0);
- else
- tp_ops->input_data(drive, NULL,
- pc->cur_pos, temp);
- printk(KERN_ERR "%s: transferred %d of "
- "%d bytes\n",
- drive->name,
- temp, bcount);
- }
- pc->xferred += temp;
- pc->cur_pos += temp;
- ide_pad_transfer(drive, 0, bcount - temp);
+
+ ide_pad_transfer(drive, 0, bcount);
goto next_irq;
}
debug_log("The device wants to send us more data than "
} else
xferfunc = tp_ops->output_data;
- if ((drive->media == ide_floppy && !scsi && !pc->buf) ||
- (drive->media == ide_tape && !scsi && pc->bh) ||
- (scsi && pc->sg)) {
+ if ((drive->media == ide_floppy && !pc->buf) ||
+ (drive->media == ide_tape && pc->bh)) {
int done = drive->pc_io_buffers(drive, pc, bcount,
!!(pc->flags & PC_FLAG_WRITING));
/* FIXME: don't do partial completions */
- if (drive->media == ide_floppy && !scsi)
+ if (drive->media == ide_floppy)
ide_end_request(drive, 1, done >> 9);
} else
xferfunc(drive, NULL, pc->cur_pos, bcount);
rq->cmd[0], bcount);
next_irq:
/* And set the interrupt handler again */
- ide_set_handler(drive, ide_pc_intr, timeout, expiry);
+ ide_set_handler(drive, ide_pc_intr, timeout, NULL);
return ide_started;
}
struct request *rq = hwif->hwgroup->rq;
ide_expiry_t *expiry;
unsigned int timeout;
+ int cmd_len;
ide_startstop_t startstop;
u8 ireason;
return startstop;
}
+ if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
+ if (drive->dma)
+ drive->waiting_for_dma = 1;
+ }
+
ireason = ide_read_ireason(drive);
- if (drive->media == ide_tape &&
- (drive->dev_flags & IDE_DFLAG_SCSI) == 0)
+ if (drive->media == ide_tape)
ireason = ide_wait_ireason(drive, ireason);
if ((ireason & ATAPI_COD) == 0 || (ireason & ATAPI_IO)) {
printk(KERN_ERR "%s: (IO,CoD) != (0,1) while issuing "
"a packet command\n", drive->name);
+
return ide_do_reset(drive);
}
- /*
- * If necessary schedule the packet transfer to occur 'timeout'
- * miliseconds later in ide_delayed_transfer_pc() after the device
- * says it's ready for a packet.
- */
- if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
- timeout = drive->pc_delay;
- expiry = &ide_delayed_transfer_pc;
+ if (dev_is_idecd(drive)) {
+ /* ATAPI commands get padded out to 12 bytes minimum */
+ cmd_len = COMMAND_SIZE(rq->cmd[0]);
+ if (cmd_len < ATAPI_MIN_CDB_BYTES)
+ cmd_len = ATAPI_MIN_CDB_BYTES;
+
+ timeout = rq->timeout;
+ expiry = ide_cd_expiry;
} else {
- if (drive->dev_flags & IDE_DFLAG_SCSI) {
- timeout = ide_scsi_get_timeout(pc);
- expiry = ide_scsi_expiry;
+ cmd_len = ATAPI_MIN_CDB_BYTES;
+
+ /*
+ * If necessary schedule the packet transfer to occur 'timeout'
+ * miliseconds later in ide_delayed_transfer_pc() after the
+ * device says it's ready for a packet.
+ */
+ if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) {
+ timeout = drive->pc_delay;
+ expiry = &ide_delayed_transfer_pc;
} else {
timeout = (drive->media == ide_floppy) ? WAIT_FLOPPY_CMD
: WAIT_TAPE_CMD;
/* Send the actual packet */
if ((drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) == 0)
- hwif->tp_ops->output_data(drive, NULL, rq->cmd, 12);
+ hwif->tp_ops->output_data(drive, NULL, rq->cmd, cmd_len);
return ide_started;
}
-ide_startstop_t ide_issue_pc(ide_drive_t *drive, unsigned int timeout,
- ide_expiry_t *expiry)
+ide_startstop_t ide_issue_pc(ide_drive_t *drive, unsigned int timeout)
{
struct ide_atapi_pc *pc = drive->pc;
ide_hwif_t *hwif = drive->hwif;
+ ide_expiry_t *expiry = NULL;
u32 tf_flags;
u16 bcount;
- u8 scsi = !!(drive->dev_flags & IDE_DFLAG_SCSI);
/* We haven't transferred any data yet */
pc->xferred = 0;
pc->cur_pos = pc->buf;
- /* Request to transfer the entire buffer at once */
- if (drive->media == ide_tape && scsi == 0)
- bcount = pc->req_xfer;
- else
- bcount = min(pc->req_xfer, 63 * 1024);
+ if (dev_is_idecd(drive)) {
+ tf_flags = IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL;
+ bcount = ide_cd_get_xferlen(hwif->hwgroup->rq);
+ expiry = ide_cd_expiry;
+ } else {
+ tf_flags = IDE_TFLAG_OUT_DEVICE;
+ bcount = ((drive->media == ide_tape) ?
+ pc->req_xfer :
+ min(pc->req_xfer, 63 * 1024));
+ }
if (pc->flags & PC_FLAG_DMA_ERROR) {
pc->flags &= ~PC_FLAG_DMA_ERROR;
ide_dma_off(drive);
}
- if ((pc->flags & PC_FLAG_DMA_OK) &&
- (drive->dev_flags & IDE_DFLAG_USING_DMA)) {
- if (scsi)
- hwif->sg_mapped = 1;
+ if (((pc->flags & PC_FLAG_DMA_OK) &&
+ (drive->dev_flags & IDE_DFLAG_USING_DMA)) ||
+ drive->dma)
drive->dma = !hwif->dma_ops->dma_setup(drive);
- if (scsi)
- hwif->sg_mapped = 0;
- }
if (!drive->dma)
pc->flags &= ~PC_FLAG_DMA_OK;
- if (scsi)
- tf_flags = 0;
- else if (drive->media == ide_cdrom || drive->media == ide_optical)
- tf_flags = IDE_TFLAG_OUT_NSECT | IDE_TFLAG_OUT_LBAL;
- else
- tf_flags = IDE_TFLAG_OUT_DEVICE;
-
ide_pktcmd_tf_load(drive, tf_flags, bcount, drive->dma);
/* Issue the packet command */
if (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT) {
+ if (drive->dma)
+ drive->waiting_for_dma = 0;
ide_execute_command(drive, ATA_CMD_PACKET, ide_transfer_pc,
- timeout, NULL);
+ timeout, expiry);
return ide_started;
} else {
ide_execute_pkt_cmd(drive);
git.openpandora.org / pandora-kernel.git / blobdiff